// Copyright (c) 2010 SuccessFactors, Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
//
//     * Redistributions of source code must retain the above
//       copyright notice, this list of conditions and the following
//       disclaimer.
//
//     * Redistributions in binary form must reproduce the above
//       copyright notice, this list of conditions and the following
//       disclaimer in the documentation and/or other materials
//       provided with the distribution.
//
//     * Neither the name of the SuccessFactors, Inc. nor the names of
//       its contributors may be used to endorse or promote products
//       derived from this software without specific prior written
//       permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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package org.owasp.jxt.tag.core;

import org.owasp.jxt.JxtNode;
import org.owasp.jxt.TextNode;
import org.owasp.jxt.TranslateContext;
import org.owasp.jxt.ValidationContext;

/**
 * CoreChooseNode
 *
 * @author Jeffrey Ichnowski
 * @version $Revision: 8 $
 */
public final class CoreChooseNode extends AbstractCoreNode {

    CoreChooseNode() {
        super("choose");
    }

    @Override
    protected void validateContent(ValidationContext ctx) {
        int otherwiseCount = 0;

        for (JxtNode c = getFirstChild() ; c != null ; c = c.getNextSibling()) {
            if (c instanceof TextNode) {
                if (((TextNode)c).getText().trim().length() > 0) {
                    ctx.error(this, "validation.content-no-text", "choose");
                }
            } else if (c instanceof CoreOtherwiseNode) {
                if (++otherwiseCount == 1) {
                    ctx.error(this, "validation.content-only-one", "otherwise");
                }
            } else if (!(c instanceof CoreWhenNode)) {
                ctx.error(this, "validation.invalid-containment", c.getTagName(), "choose");
            }
        }
    }

    @Override
    public void translate(TranslateContext ctx) {
        // TODO: add validation that the children are correct e.g. at
        // most 1 "otherwise", and minimum 1 "when", and no other
        // types of children (except empty Text)

        JxtNode otherwise = null;

        for (JxtNode c = getFirstChild() ; c != null ; c = c.getNextSibling()) {
            if (c instanceof CoreWhenNode) {
                c.translate(ctx);
            } else if (c instanceof CoreOtherwiseNode) {
                otherwise = c;
            }
        }

        if (otherwise != null) {
            otherwise.translate(ctx);
        }
    }
} // CoreChooseNode
